论文标题
与麦哲伦 / iMac的Abell 133中的恒星质量测量
Stellar mass measurements in Abell 133 with Magellan / IMACS
论文作者
论文摘要
我们介绍了Galaxy群集Abell 133的深度光学成像的分析，并在Magellan上的iMacs仪器进行了分析。我们的多波段光度法可以使群集成员星系中的出色质量测量值降至$ m_ \ star = 3 \ times10^8 \，m_ \ odot $（$ \ odot $（$ \ odot $）（$ \大约0.1 $的大麦芽岩云云星座）。我们观察到集群中大型和矮星系的空间分布有明显的差异。分别对这些星系群进行建模，我们可以自信地跟踪锁定星系中恒星质量的分布，以与群集的病毒半径。集群最亮的星系的扩展信封可以跟踪到$ \ sim 200 $ kpc。中央星系在半径$ r_ {500c} $中贡献$ \ sim 1/3 $。
We present the analysis of deep optical imaging of the galaxy cluster Abell 133 with the IMACS instrument on Magellan. Our multi-band photometry enables stellar mass measurements in the cluster member galaxies down to a mass limit of $M_\star=3\times10^8\,M_\odot$ ($\approx 0.1$ of the Large Magellanic Cloud stellar mass). We observe a clear difference in the spatial distribution of large and dwarf galaxies within the cluster. Modeling these galaxies populations separately, we can confidently track the distribution of stellar mass locked in the galaxies to the cluster's virial radius. The extended envelope of the cluster's brightest galaxy can be tracked to $\sim 200$ kpc. The central galaxy contributes $\sim 1/3$ of the the total cluster stellar mass within the radius $r_{500c}$.
